top level window meaning in English

最上层视窗

Class for a top level window - in other words , one that is managed by the os window manager
窗口是顶级窗口（换句话说，由os窗口管理器管理的窗口）的
A jface window is not actually the gui object for a top level window swt already provides one , called a
Jface窗口实际上不是顶级窗口的gui对象（ swt已经提供了一个，名为
When memory pressure from running applications is intensive , windows ce sends the wm hibernate message to top level windows
当正在运行的应用程序导致内存告急时， windows ce会向顶层窗口发送wm _ hibernate消息。